use complete label for comment field if there are multiple custom fields rendered

app/forms/custom_fields/comment_field.rb

@@ -34,17 +34,18 @@ module CustomFields
       comment_form.text_area(**attributes)
     end
 
-    def initialize(custom_field:, object:)
+    def initialize(custom_field:, object:, complete_label: false)
       super()
 
       @custom_field = custom_field
       @object = object
+      @complete_label = complete_label
     end
 
     def attributes
       {
         name: @custom_field.id.to_s,
-        label: I18n.t("attributes.comment"),
+        label: @complete_label ? I18n.t(:label_custom_comment, name: @custom_field.name) : I18n.t("attributes.comment"),
         value: @custom_field.comment_for(@object)&.text,
         rows: 5
       }

app/forms/custom_fields/custom_field_rendering.rb

@@ -57,7 +57,7 @@ module CustomFields::CustomFieldRendering
       end
       if custom_field.has_comment?
         form.fields_for(:custom_comments) do |builder|
-          CustomFields::CommentField.new(builder, custom_field: custom_field, object: model)
+          custom_comment_input(builder, custom_field)
         end
       end
     end
@@ -82,9 +82,18 @@ module CustomFields::CustomFieldRendering
     end
   end
 
+  def custom_comment_input(builder, custom_field)
+    CustomFields::CommentField.new(
+      builder,
+      custom_field:,
+      object: model,
+      complete_label: custom_fields.length > 1
+    )
+  end
+
   def form_arguments(custom_field)
     {
-      custom_field: custom_field,
+      custom_field:,
       object: model
     }.merge(additional_custom_field_input_arguments)
   end

spec/forms/custom_fields/comment_field_spec.rb

@@ -37,6 +37,14 @@ RSpec.describe CustomFields::CommentField, type: :forms do
 
   it_behaves_like "rendering label", "Comment"
 
+  context "when showing complete label" do
+    def build_form(builder)
+      described_class.new(builder, custom_field:, object: model, complete_label: true)
+    end
+
+    it_behaves_like "rendering label", "Project custom field comment"
+  end
+
   context "without a value" do
     it "renders field" do
       expect(rendered_form).to have_field "Comment", type: :textarea, with: ""